Tablet-machine.



Patented Feb. l2, |904. E V PECHIN TABLET MACHINE.

led Nov. 30, 1900.1

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(Application UNO Model.)

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EDWr'lRD V. IECHIN, OE PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO Tllllt II. K. MULFORD COMPANY, OF SAME PLACE.

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SPEGIFEATLLMM forming part of Letters Patent No. 668,016, dated February 12, 1901.

Application tiled November 30, 1900. Serial No. 88,216. (No model.)

To all who/1t it may concern,.-

Be it linown that l, EDWARD V. PECHIN, a citizen oi' the United States, residing in Philad elphia, Pennsylvania, have invented certain Improvements in Tablet-Machines, of which the following is a specification.

My invention relates to certain improvements in tablet-making machines, and in particular to improvements in the plunger-heads oi' machines of the type covered by my application for patent, Serial No. 739,537, allowed July 2e, 1900.

The object of my invention is to so construct the plunger-heads on machines of this class that it shall bepossible to use one or more Y punches for forming tablets by but a slight change in the mechanism involved. Formerly when it was desired to adjust a machine to forni three tablets, for instance, instead of two at one stroke it was necessary to replace both the Lipper and lower plunger heads which held but two punches by others having the required number of punches. By myinvention I am enabled to use but one set of plunger-heads, while being able to adjust the machine to forni any practical number of tablets at one stroke. This object I attain in the following manner, reference being had to the accompanying drawings, in which- Figure lis a sectional view of su'liicient of a tablet-making machine to show the construction and use of my improved plnngerhead. Fig. 2 is an inverted plan view of the upper plunger, showing two punches held in place by my device; and Fig. 3 is a plan view of the lower plunger-head, sho wing the two ejectors.

Referring to l, A is part of the frame of the machine, lntving a table A2, in which is the die 7L, having orifices in which the tablets are formed. The plunger B is mounted in guides A on the frame. and is reciprocated toward and from the table A2.

F is a plunger-head screwed into the plunger B and preferably held in place by a setscrew n. This head consists of the threaded portion n, having an extension n2, on which the cap m tits tightly. This cap has an internal flange at its outer end. An end piece gis nicuntedin the cap and is held in place by said flange. The end piece has two or more holes through which headed punches f f project, the heads of the punches being confined between the end piece and a block e'. This block` has a rounded upper surface reste ing against the end of the extension n2.

O is the lower plunger, carrying the lower plu ngel-head D, which in the present instance is screwed into it. This head consists of the supporting-piece dl, having a head d2, an end piece g, and the flanged cap d, said cap being screwed onto the head cl2, as shown in Fig. 1. Vithin the cap is a block c, rounded on its under side and supporting the ejectorsff, which pass through the end piece g. The heads of the ejectors are confined between the block e and the end piece. The head D operates in the cavity G of the table A2. The ejectors extend into the orifices in the die 7L, forming the bottom of the die. The plate 7;; is the die-filling plate and has a passage connected to a hopper, neither of the latter being shown, said hopper supplying material to be made into tablets. The plate is recipro* cated and agitated' over the die by appropriate mechanism, allowing the material to pack evenly in the die and then returning, so as to permit the plungers to compress the material. As the plate moves away from the die the upper plunger compresses the material therein and the lower plunger is raised so as to eject the compressed tablet.

The end pieces g and g are preferably circular in outline and have the holes for two or more punches or ejectors arranged as shown in Figs. 2 and It will be understood by those skilled in the art that it is often desired to vary the number of tablets formed at one stroke of the machine, and in order to do this it was formerly necessary to replace the caps d and m by others having a number of holes corresponding to the number ol punches used, loesides inserting said punches and the proper die. By my invention it is not necessary to carry a stock of caps having different numbers of holes for each number of punches used in the machine, a set of removable plates g and g', having various numbers of apertures, being used instead,lwith but one set of caps vfor the plunger-heads in which said end plates or pieces can be inserted.

I claim as my invention- 1. In a plunger-head for a tablet-making machine, the combination of a body portion constructed to be attached to a plunger, a cap on said body portion, an end piece held in Said cap and having holes therein and punches projecting through said holes, subst-antially as described.

2. In a plunger-head for a tablet-making machine, the combination of a body portion constructed to be attached to a plunger, a cap on said body portion having an inwardlyprojecting flange at the end, an end piece held in said cap by said flange, having one or more holes therein and one or more punches projecting through said holes, substantially as described.

3. The combination in a plunger-head for a tablet-making machine, of a body portion screwed into a plunger and having an exten- Sion, a cap fitting on said extension constructed with an inwardly-projecting flange at its end, a removable circular end piece held in said cap by the iiange, one or more holes in said end piece, one or more headed punches projecting through said holes and a block between the extension of the body-section and the heads of the punches, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of tWo subscribing Witnesses.

EDWARD v. PEGI-IIN.

Witnesses:

WILLIAM E. BRADLEY, Jos. H. KLEIN. 

